bool
depends on HAVE_IRQ_WORK
+config BUILDTIME_EXTABLE_SORT
+ bool
+
menu "General setup"
config EXPERIMENTAL
but may not be backwards compatible with older init systems.
source "kernel/irq/Kconfig"
+source "kernel/time/Kconfig"
menu "RCU Subsystem"
Select a specific number if testing RCU itself.
Take the default if unsure.
+config RCU_FANOUT_LEAF
+ int "Tree-based hierarchical RCU leaf-level fanout value"
+ range 2 RCU_FANOUT if 64BIT
+ range 2 RCU_FANOUT if !64BIT
+ depends on TREE_RCU || TREE_PREEMPT_RCU
+ default 16
+ help
+ This option controls the leaf-level fanout of hierarchical
+ implementations of RCU, and allows trading off cache misses
+ against lock contention. Systems that synchronize their
+ scheduling-clock interrupts for energy-efficiency reasons will
+ want the default because the smaller leaf-level fanout keeps
+ lock contention levels acceptably low. Very large systems
+ (hundreds or thousands of CPUs) will instead want to set this
+ value to the maximum value possible in order to reduce the
+ number of cache misses incurred during RCU's grace-period
+ initialization. These systems tend to run CPU-bound, and thus
+ are not helped by synchronized interrupts, and thus tend to
+ skew them, which reduces lock contention enough that large
+ leaf-level fanouts work well.
+
+ Select a specific number if testing RCU itself.
+
+ Select the maximum permissible value for large systems.
+
+ Take the default if unsure.
+
config RCU_FANOUT_EXACT
bool "Disable tree-based hierarchical RCU auto-balancing"
depends on TREE_RCU || TREE_PREEMPT_RCU
depends on RCU_BOOST
default 1
help
- This option specifies the real-time priority to which preempted
- RCU readers are to be boosted. If you are working with CPU-bound
- real-time applications, you should specify a priority higher then
- the highest-priority CPU-bound application.
+ This option specifies the real-time priority to which long-term
+ preempted RCU readers are to be boosted. If you are working
+ with a real-time application that has one or more CPU-bound
+ threads running at a real-time priority level, you should set
+ RCU_BOOST_PRIO to a priority higher then the highest-priority
+ real-time CPU-bound thread. The default RCU_BOOST_PRIO value
+ of 1 is appropriate in the common case, which is real-time
+ applications that do not have any CPU-bound threads.
+
+ Some real-time applications might not have a single real-time
+ thread that saturates a given CPU, but instead might have
+ multiple real-time threads that, taken together, fully utilize
+ that CPU. In this case, you should set RCU_BOOST_PRIO to
+ a priority higher than the lowest-priority thread that is
+ conspiring to prevent the CPU from running any non-real-time
+ tasks. For example, if one thread at priority 10 and another
+ thread at priority 5 are between themselves fully consuming
+ the CPU time on a given CPU, then RCU_BOOST_PRIO should be
+ set to priority 6 or higher.
Specify the real-time priority, or take the default if unsure.
config USER_NS
bool "User namespace (EXPERIMENTAL)"
depends on EXPERIMENTAL
- default y
+ depends on UIDGID_CONVERTED
+ select UIDGID_STRICT_TYPE_CHECKS
+
+ default n
help
This allows containers, i.e. vservers, to use user namespaces
to provide different user info for different servers.
endif # NAMESPACES
+config UIDGID_CONVERTED
+ # True if all of the selected software conmponents are known
+ # to have uid_t and gid_t converted to kuid_t and kgid_t
+ # where appropriate and are otherwise safe to use with
+ # the user namespace.
+ bool
+ default y
+
+ # List of kernel pieces that need user namespace work
+ # Features
+ depends on SYSVIPC = n
+ depends on IMA = n
+ depends on EVM = n
+ depends on KEYS = n
+ depends on AUDIT = n
+ depends on AUDITSYSCALL = n
+ depends on TASKSTATS = n
+ depends on TRACING = n
+ depends on FS_POSIX_ACL = n
+ depends on QUOTA = n
+ depends on QUOTACTL = n
+ depends on DEBUG_CREDENTIALS = n
+ depends on BSD_PROCESS_ACCT = n
+ depends on DRM = n
+ depends on PROC_EVENTS = n
+
+ # Networking
+ depends on NET = n
+ depends on NET_9P = n
+ depends on IPX = n
+ depends on PHONET = n
+ depends on NET_CLS_FLOW = n
+ depends on NETFILTER_XT_MATCH_OWNER = n
+ depends on NETFILTER_XT_MATCH_RECENT = n
+ depends on NETFILTER_XT_TARGET_LOG = n
+ depends on NETFILTER_NETLINK_LOG = n
+ depends on INET = n
+ depends on IPV6 = n
+ depends on IP_SCTP = n
+ depends on AF_RXRPC = n
+ depends on LLC2 = n
+ depends on NET_KEY = n
+ depends on INET_DIAG = n
+ depends on DNS_RESOLVER = n
+ depends on AX25 = n
+ depends on ATALK = n
+
+ # Filesystems
+ depends on USB_DEVICEFS = n
+ depends on USB_GADGETFS = n
+ depends on USB_FUNCTIONFS = n
+ depends on DEVTMPFS = n
+ depends on XENFS = n
+
+ depends on 9P_FS = n
+ depends on ADFS_FS = n
+ depends on AFFS_FS = n
+ depends on AFS_FS = n
+ depends on AUTOFS4_FS = n
+ depends on BEFS_FS = n
+ depends on BFS_FS = n
+ depends on BTRFS_FS = n
+ depends on CEPH_FS = n
+ depends on CIFS = n
+ depends on CODA_FS = n
+ depends on CONFIGFS_FS = n
+ depends on CRAMFS = n
+ depends on DEBUG_FS = n
+ depends on ECRYPT_FS = n
+ depends on EFS_FS = n
+ depends on EXOFS_FS = n
+ depends on FAT_FS = n
+ depends on FUSE_FS = n
+ depends on GFS2_FS = n
+ depends on HFS_FS = n
+ depends on HFSPLUS_FS = n
+ depends on HPFS_FS = n
+ depends on HUGETLBFS = n
+ depends on ISO9660_FS = n
+ depends on JFFS2_FS = n
+ depends on JFS_FS = n
+ depends on LOGFS = n
+ depends on MINIX_FS = n
+ depends on NCP_FS = n
+ depends on NFSD = n
+ depends on NFS_FS = n
+ depends on NILFS2_FS = n
+ depends on NTFS_FS = n
+ depends on OCFS2_FS = n
+ depends on OMFS_FS = n
+ depends on QNX4FS_FS = n
+ depends on QNX6FS_FS = n
+ depends on REISERFS_FS = n
+ depends on SQUASHFS = n
+ depends on SYSV_FS = n
+ depends on UBIFS_FS = n
+ depends on UDF_FS = n
+ depends on UFS_FS = n
+ depends on VXFS_FS = n
+ depends on XFS_FS = n
+
+ depends on !UML || HOSTFS = n
+
+ # The rare drivers that won't build
+ depends on AIRO = n
+ depends on AIRO_CS = n
+ depends on TUN = n
+ depends on INFINIBAND_QIB = n
+ depends on BLK_DEV_LOOP = n
+ depends on ANDROID_BINDER_IPC = n
+
+ # Security modules
+ depends on SECURITY_TOMOYO = n
+ depends on SECURITY_APPARMOR = n
+
+config UIDGID_STRICT_TYPE_CHECKS
+ bool "Require conversions between uid/gids and their internal representation"
+ depends on UIDGID_CONVERTED
+ default n
+ help
+ While the nececessary conversions are being added to all subsystems this option allows
+ the code to continue to build for unconverted subsystems.
+
+ Say Y here if you want the strict type checking enabled
+
config SCHED_AUTOGROUP
bool "Automatic process group scheduling"
select EVENTFD
config PERF_EVENTS
bool "Kernel performance events and counters"
- default y if (PROFILING || PERF_COUNTERS)
+ default y if PROFILING
depends on HAVE_PERF_EVENTS
select ANON_INODES
select IRQ_WORK
Say Y if unsure.
-config PERF_COUNTERS
- bool "Kernel performance counters (old config option)"
- depends on HAVE_PERF_EVENTS
- help
- This config has been obsoleted by the PERF_EVENTS
- config option - please see that one for details.
-
- It has no effect on the kernel whether you enable
- it or not, it is a compatibility placeholder.
-
- Say N if unsure.
-
config DEBUG_PERF_USE_VMALLOC
default n
bool "Debug: use vmalloc to back perf mmap() buffers"
projects / firefly-linux-kernel-4.4.55.git / blobdiff